Ninja only: Pool used for generating pre-compiled headers.
The number of parallel compile processes could be limited by defining pools with the global JOB_POOLS property and then specifying here the pool name.
For instance:
set_property(TARGET myexe PROPERTY JOB_POOL_PRECOMPILE_HEADER two_jobs)
This property is initialized by the value of CMAKE_JOB_POOL_PRECOMPILE_HEADER.
If neither JOB_POOL_PRECOMPILE_HEADER nor CMAKE_JOB_POOL_PRECOMPILE_HEADER are set then JOB_POOL_COMPILE will be used for this task.